Price increase after order confirmation / contract conclusion

Based on the offer, we concluded a contract at the end of March (written confirmation of order amount and items) which was signed by both parties and is in our possession.

Contracts must be adhered to.

There is nothing regarding price increases etc. noted in the contract, nor is there a clause or anything similar.

Someone has combined their entrepreneurial risk with stupidity.

If it starts off like this, prepare for expensive surcharges on sample upgrades. Hopefully, your construction service description is already sufficiently comprehensive.

Well, legally the general contractor would bear the loss from their own stupidity. Practically, I expect that they will try to recoup the loss at every opportunity. With sample upgrades, this will require strict discipline, and possibly some cunning.

As much as you will dislike reading this: Terminate the contract quickly with a lawyer due to serious reasons, loss of trust, and so on. Disputes already before the first groundbreaking!? If it starts like this, it can't end well. Otherwise, you will probably bitterly regret it later.

Is not a general contractor, but a single trade. For the other trades, everything currently fits - luckily. We do not want to cancel in the first step, but the legal situation would still be of interest. What "annoys" me: if the prices went down, he would also pocket the amount. But I can't either, if not already ordered or if the prices become more expensive.

Which trade is it about and what is the order volume?

First clarify what costs are involved. It is a crappy situation for both sides. Quitting and starting over is certainly not an option that will really get you anywhere.

First clarify which costs are involved. It is a crappy situation for both sides. Quitting and starting over is certainly not an option that will really help you.

Yes, that's exactly what we want to do, or rather he is handling it. As mentioned, we also do not want to quit and I hope that we can come to an agreement when he states the additional costs. But I just wanted to know in advance how it looks legally or if anyone already has experience.
As said, our goal is definitely to reach an agreement.